WO2018082238A1

WO2018082238A1 - Biological filter bed used for treating wastewater

Info

Publication number: WO2018082238A1
Application number: PCT/CN2017/077053
Authority: WO
Inventors: 柴喜林; 王世君
Original assignee: 江西盖亚环保科技有限公司
Priority date: 2016-11-07
Filing date: 2017-03-17
Publication date: 2018-05-11
Also published as: CN106379996A

Abstract

A biological filter bed used for treating wastewater. The filter bed comprises in a downward sequence a water distributing layer (1), an aerobic layer (2), a facultative anaerobic layer (3), an anaerobic layer (4), and a water collecting layer (5). The water distributing layer (1) is provided with water distributing pipes scattered in the horizontal direction. Multiple water distributing holes are provided on the water distributing pipes. The multiple water distributing holes are scattered in the horizontal direction. The biological filter bed is used for treating livestock and poultry farming wastewater.

Description

Biological filter bed for treating wastewater

Technical field

The invention relates to the field of ecological environmental protection technology, in particular to a biological filter bed for treating wastewater.

Background technique

The structure of the biological filter bed is divided into a water distribution system, a matrix layer, a support layer and a water collection system from top to bottom. The principle is similar to the rapid infiltration filtration in the land treatment, and can adsorb and degrade the organic matter and ammonia nitrogen and other pollutants. . At present, livestock and poultry manure is rich in nitrogen, phosphorus, potassium and abundant organic matter. It also contains many volatile substances, pathogenic microorganisms, parasite eggs and heavy metals. If it is not treated, direct discharge will bring great environmental impact. The harm has brought serious economic losses to the society. Even the predicted results show that by 2020, the amount of manure generated by livestock and poultry farming in China will reach 298 million tons, and the pollution pressure on livestock and poultry breeding will increase substantially. Therefore, how to design a biological filter bed that can efficiently treat livestock and poultry breeding wastewater has become a topic of close concern for researchers in the field of ecological protection.

However, in the prior art, the biological filter bed for treating livestock and poultry breeding wastewater is prone to supersaturation and unreacted phenomena during the reaction process due to uneven distribution of water, etc. during actual operation. The effluent quality does not meet national emission standards.

Summary of the invention

The object of the present invention is to provide a biological filter bed for treating wastewater, which can avoid or at least alleviate the problem that microorganisms are prone to supersaturation and unreacting during the reaction, and efficiently treat Waste water, and easy to operate, especially suitable for the treatment of livestock and poultry farming wastewater.

In order to achieve the above object, the present invention provides a biological filter bed for treating wastewater, wherein the biological filter bed includes a water layer, an aerobic layer, a facultative layer, an anaerobic layer, and a water collecting layer from top to bottom. The water distribution layer is provided with a water distribution pipe dispersedly arranged in a horizontal direction, and the water distribution pipe is provided with a plurality of water distribution holes, and the plurality of water distribution holes are dispersedly arranged in a horizontal direction.

Preferably, the water distribution pipe comprises a water distribution main pipe, and the water distribution main pipe is connected with a plurality of horizontal pipes. The water distribution pipe provided in the direction interval is provided with a plurality of water distribution holes on each of the water distribution pipes.

Preferably, the spacing between all two adjacent water distribution pipes is equal.

Preferably, the spacing between all adjacent two water holes on each water branch pipe is equal.

Preferably, the water distribution pipe comprises a plurality of water pipes that are bent and spaced a plurality of times.

Preferably, the aerobic layer and the facultative layer are respectively provided with a gas distribution pipe.

Preferably, the gas distribution pipe comprises a plurality of aeration pipes arranged in a horizontal direction, and each of the aeration pipes is provided with a plurality of spaced aeration holes.

Preferably, a gravel layer is disposed between each adjacent two of the water distribution layer, the aerobic layer, the oxine layer, the anaerobic layer, and the water collecting layer.

Preferably, the aerobic layer has aerobic coarse granules, the facultative layer has anaerobic coarse granules, and the anaerobic layer has anaerobic fines.

Preferably, the water distribution pipe is connected to a water pump.

Compared with the prior art, the invention has the following advantages:

Since the biological filter bed comprises, in order from top to bottom, a water distribution layer, an aerobic layer, a facultative layer, an anaerobic layer and a water collecting layer, the water distribution layer is provided with a water distribution pipe dispersedly arranged in a horizontal direction. The water distribution pipe is provided with a plurality of water distribution holes, and a plurality of water distribution holes are arranged in a horizontal direction, and all the distributed water distribution pipes and the water distribution holes can form a water distribution port which is evenly distributed above the aerobic layer. After the treated wastewater flows out of the water distribution pipe through the water distribution pipe, a relatively uniform distribution of water flow is generated, and the water flow flows through each layer under the action of gravity, thereby ensuring that the aerobic, anaerobic and anaerobic reactions of the microorganism can be fully carried out, and finally can be passed. The water collecting layer collects the standard wastewater. It can be seen that the biological filter bed for treating wastewater can avoid or at least alleviate the problem that microorganisms are prone to over-saturation and unreacting during the reaction process, and efficiently treat wastewater, and is particularly suitable for treating livestock and poultry breeding wastewater. The treated wastewater passes through the filter bed from top to bottom by gravity, and no other equipment is needed, so the biological filter bed is easy to operate.

Other features and advantages of the invention will be described in detail in the detailed description which follows.

DRAWINGS

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the specific embodiments or the description of the prior art will be briefly described below, and obviously, the attached in the following description The figures are some embodiments of the invention, which will be apparent to those of ordinary skill in the art In other words, other drawings can be obtained from these drawings without any creative work.

1 is a cross-sectional view of a biofilter bed for treating wastewater in accordance with an embodiment of the present invention.

2 is a schematic view of a water distribution pipe according to a first embodiment of the present invention.

Figure 3 is a schematic illustration of a water distribution conduit in accordance with a second embodiment of the present invention.

Description of the reference numerals

1 cloth water layer 2 aerobic layer

3 facultative layer 4 anaerobic layer

5 water level 6 water supervisor

7 water branch pipe 8 water pipe

9 aeration pipe 10 water collection pipe

21 aerobic coarse pellets 31 anaerobic coarse pellets

41 anaerobic fines

detailed description

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative and not restrictive.

Referring to Fig. 1, the present invention provides a biological filter bed for treating wastewater, wherein the biological filter bed includes a water distribution layer 1, an aerobic layer 2, a facultative oxygen layer 3, an anaerobic layer 4, and a set from top to bottom. The water layer 5 and the water distribution layer 1 are provided with a water distribution pipe which is arranged in a horizontal direction, and a plurality of water distribution holes are arranged on the water distribution pipe, and a plurality of water distribution holes are arranged in a horizontal direction. Here, the water distribution pipe is usually connected to the water pump, and the waste water to be treated (for example, livestock and poultry farming wastewater) can be pumped into the water distribution layer 1 by a water pump.

As described above, since the biological filter bed includes the water distribution layer 1, the aerobic layer 2, the oxidizing layer 3, the anaerobic layer 4, and the water collecting layer 5 in order from top to bottom, the water layer 1 is disposed in the horizontal direction. The water distribution pipe is arranged in a distributed manner, and a plurality of water distribution holes are arranged on the water distribution pipe, and a plurality of water distribution holes are arranged in a horizontal direction, so that the distributed water distribution pipe and the water distribution hole can form a distribution on the aerobic layer 2 together. A relatively uniform water outlet, after the waste water to be treated flows out of the water distribution pipe through the water distribution pipe, a relatively uniform distribution of water flow is generated, and the water flow flows through each layer under the action of gravity, thereby ensuring microbial aerobic, anaerobic and anaerobic reactions. It can be fully carried out, and finally the standard wastewater can be collected through the water collecting pipe 10 in the water collecting layer 5. Look at it The biological filter bed for treating wastewater can avoid or at least alleviate the problem that microorganisms are prone to supersaturation and unreacting during the reaction process, and efficiently treat wastewater, and is particularly suitable for treating livestock and poultry breeding wastewater, and further, processed The wastewater passes through the filter bed from top to bottom by gravity, and no other equipment is required, so the biological filter bed is easy to operate.

Among them, the aerobic layer 2 has aerobic coarse pellets 21 (aerobic activated sludge, etc.), the oxyphilic layer 3 has anaerobic coarse pellets 31 (oxygen-activated sludge, etc.), and the anaerobic layer 4 has anaerobic fineness. Material 41 (anaerobic activated sludge, etc.).

Referring to FIG. 2, according to a first embodiment of the present invention, the water distribution pipe may include a water distribution main pipe 6, and the water distribution main pipe 6 is connected with a plurality of water distribution pipe pipes 7 which are arranged at intervals in the horizontal direction, and may be every 1-2 A water distribution pipe 7 is disposed around the meter, and a plurality of water distribution holes are provided in each of the water distribution pipes 7.

In order to make the wastewater to be treated flow out of the water distribution pipe through the water distribution pipe, a completely uniform distribution of the water flow is generated, and the spacing between all the adjacent two water distribution pipes 7 can be designed to be equal, and each water distribution pipe The spacing between all adjacent two water holes on 7 is designed to be equal.

Referring to Figure 3, in accordance with a second embodiment of the present invention, the water distribution conduit may include a plurality of water pipes 8 that are bent and spaced apart.

Of course, the distributed arrangement of the water distribution pipe of the present invention is not limited to the first and second embodiments described above, as long as the water distribution pipe can achieve a more uniform water distribution effect, regardless of the dispersion arrangement. It will fall within the scope of protection of the present invention.

In addition, in order to ensure that the microorganisms in the filler (aerobic coarse granules 21, etc.) are kept in an optimal state, the reaction is optimally achieved, and the aerobic layer 2 and the facultative layer 3 are provided with a gas distribution pipe, which is an aerobic layer cloth, respectively. Gas pipelines and gas-conducting pipelines.

Preferably, the gas distribution pipe comprises a plurality of aeration pipes 9 arranged in a horizontal direction, and each of the aeration pipes 9 is provided with a plurality of spaced aeration holes (the aeration holes may be formed on the aeration head), specifically Ground, an aeration hole can be set every 10-30cm). Of course, in a plurality of aeration tubes 9, the spacing between all two adjacent aeration tubes 9 in the horizontal direction can be designed to be equal, and all adjacent two aeration holes on each aeration tube 9 The spacing between the two can be designed to be equal, so that a completely uniform air distribution is achieved.

In addition, a gravel layer is disposed between each adjacent layer of the water layer 1, the aerobic layer 2, the oxine layer 3, the anaerobic layer 4, and the water collecting layer 5 to reduce the mutual filler of the different reaction layers. interference.

It is apparent that the above-described embodiments are merely illustrative of the examples, and are not intended to limit the embodiments. For those of ordinary skill in the art, based on the above description Other different forms of changes or changes can be made. There is no need and no way to exhaust all of the implementations. Obvious changes or variations resulting therefrom are still within the scope of the invention.

Claims

A biological filter bed for treating wastewater, characterized in that the biological filter bed comprises a water layer (1), an aerobic layer (2), a facultative layer (3) and an anaerobic layer in order from top to bottom. (4) and a water collecting layer (5), the cloth water layer (1) is provided with a water distribution pipe dispersedly arranged in a horizontal direction, the cloth water pipe is provided with a plurality of water distribution holes, and a plurality of water distribution holes Disperse in the horizontal direction.
The biological filter bed for treating wastewater according to claim 1, wherein the water distribution pipe comprises a water distribution main pipe (6), and the distribution water main pipe (6) is connected with a plurality of horizontally spaced intervals. The water distribution pipe (7) and the water distribution pipe (7) are provided with a plurality of water distribution holes.
A biological filter bed for treating wastewater according to claim 2, characterized in that the spacing between all two adjacent said water branch pipes (7) is equal.
A biological filter bed for treating wastewater according to claim 2, characterized in that the spacing between all adjacent two water holes on each of the water branch pipes (7) is equal.
A biological filter bed for treating wastewater according to claim 1, wherein the water distribution pipe comprises a plurality of bent and spaced water pipes (8).
The biological filter bed for treating wastewater according to any one of claims 1 to 5, characterized in that the aerobic layer (2) and the oxygenation layer (3) are respectively provided with a gas distribution duct.
The biological filter bed for treating wastewater according to claim 6, wherein the gas distribution duct comprises a plurality of aeration tubes (9) arranged in a horizontal direction, and each of the aeration tubes ( 9) A plurality of spaced aeration holes are provided on the upper side.
A biological filter bed for treating wastewater according to any one of claims 1 to 5, characterized in that the aqueous layer (1), the aerobic layer (2), the facultative layer (3), and the anaerobic layer A gravel layer is disposed between each of the adjacent layers in the oxygen layer (4) and the water collecting layer (5).
A biological filter bed for treating wastewater according to any one of claims 1 to 5, characterized in that the aerobic layer (2) has aerobic coarse aggregates (21), the facultative layer ( 3) having anaerobic coarse granules (31) having anaerobic fines (41).
A biological filter bed for treating wastewater according to any one of claims 1 to 5, wherein the water distribution pipe is connected to a water pump.